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Embedded loop filtering method and embedded loop filtering device

An embedded, loop technology, applied in the field of image coding system, can solve the problem of inability to process and process the maximum coding unit

Active Publication Date: 2015-12-09
HFI INNOVATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since a 5x5 snowflake filter is used, the adaptive loop filter is unable to process pixel rows beyond pixel row I, as shown by base pixel 832 on pixel row I of filter footprint 830, In this process, the current LCU cannot be processed any further until the lower LCU is obtained

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Embodiment Construction

[0056] Figure 9 It is a schematic diagram of an example of a processing flow according to an embodiment of the present invention, which shows the deblocking filtering processing, sampling point adaptive offset processing and adaptive loop filtering processing required by the decoding system based on the largest coding unit. Luma pixel row buffer. A known current LCU is located in the upper right quadrant of the horizontal LCU boundary 910 and the vertical LCU boundary 912 . Pixel row A to pixel row J are firstly processed by horizontal deblocking filtering, and then are processed by vertical deblocking filtering. As mentioned before, in order to avoid the need to use the pixel row buffer of the pixels after horizontal deblocking processing for the vertical deblocking filtering processing of pixel row K to pixel row N, the horizontal filtering processing of pixel row K to pixel row N can be delayed It is performed after the lower LCU can be obtained. Therefore, when the lowe...

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Abstract

A method and apparatus for in-loop processing of reconstructed video are disclosed. The reconstructed video data is partitioned into image units. Horizontal deblocking is applied to the reconstructed video data across vertical image-unit boundaries and then vertical deblocking operates on n pixels of horizontal-deblocked video data on each side of horizontal image-unit boundaries. According to various embodiments of the present invention, the horizontal deblocking is applied to at least one of said n reconstructed lines to generate at least a horizontal-deblocked line for line pn-1. Sample adaptive offset (SAO) processing is then applied to at least a horizontal-deblocked line for line pn based on the horizontal-deblocked line for line pn-1. The above steps are performed before a neighboring image unit below the current image unit arrives.

Description

technical field [0001] The embodiments disclosed in the present invention are related to a video coding system, especially a method and device related to the implementation of an embedded loop filter of a video encoder or decoder. Background technique [0002] Motion estimation is a high-efficiency interframe coding scheme that exploits temporal redundancy in continuous images. Motion-compensated inter-frame coding is widely used in various international image coding standards. A variety of coding standards usually use a block-based motion estimation technology, in which the motion information is determined for each macroblock or similar block settings, such as coding Mode (codingmode) and motion vector (motionvector). In addition, intra-coding can also be adopted in an adaptive manner, that is, only a single frame is processed without referring to other frames. Inter-predicted or intra-predicted residues are usually additionally transformed, quantized, and entropycoded t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/82H04N19/70H04N19/91
Inventor 徐志玮黄毓文
Owner HFI INNOVATION INC